Tetragrammaton
Pronunciation : Tet`ra*gram"ma*ton
Part of Speech : n.
Etymology : [NL., fr. Gr. Tetra-) +
Definition : Defn: The mystic number four, which was often symbolized to represent the Deity, whose name was expressed by four letters among some ancient nations; as, the Hebrew JeHoVaH, Greek qeo`s, Latin deus, etc.
Source : Webster's Unabridged Dictionary, 1913